EXAMIANS
When the cutting edge of the tool is dull, then during machining
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Volume of a cube of side ‘l’ and volume of a sphere of radius ‘r’ are equal. Both the cube and the sphere are solid and of same material. They are being cast. The ratio of the solidification time of the cube to the same of the sphere is
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A process of removing metal by pushing or pulling a cutting tool is called
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Fixtures are used
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If the helix angle of the drill is made ________ 30°, then the torque required to drive the drill at a given feed will be more.
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Work speed of circular electrode of 220 mm diameter for carrying out seam welding at 4 welds per cm on 1.6 mm thick mild steel tube. Welding cycle consists of 3 cycles ‘on’ and 2 cycles ‘off’ Power supply is at 50 Hz. Calculate R.P.M. and energy requirement of the above circular electrodes assuming effective resistance between electrodes as 100 ohm.
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In drilling operation, the metal is removed by
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For machining a mild steel workpiece by a high speed steel tool, the average cutting speed is
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The lathe spindles at the nose end have
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The tool life is said to be over if
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